area of a circle is PI x r^2
2 = d/2 = 5.4/2 = 2.7 cm
 using 3.14 for PI
3.14 x 2.7^2 = 22.89 square inches
360 degree in a circle, shaded area is 180 degree, which is 50%
 so 22.89 x .5 = 11.45 cm^2
 
        
             
        
        
        
The answer is 6t^2+2.5x^2-0.5t-5.4
        
             
        
        
        
-9(3-r)=45
-27+9t=45
9r=45+27
R=72/9
R=8 
The answer is 8 not -8
        
             
        
        
        
Hello! 
I believe the answers are:
A) The vertex is (1, −6) 
C) The graph has a minimum.
I hope it helps!
 
        
                    
             
        
        
        
32 models of 100. you are prone for elementary questions in all subjects and i accept that very dearly, thank you